我没有从 Amazon Lambda 获得适当的 JSON 响应

Question

嘿，Whosebug 的乐于助人的人们！我发现自己需要您的一些帮助和专业知识。我正在学习关于创建 Amazon Alexa 技能的教程，当我测试 lambda 函数的代码时，它成功了，但是，当我使用我指定给它的示例话语时，它是 "get current weather"（不要介意话语与实际端点无关，此时我使用 json 占位符的端点：https://jsonplaceholder.typicode.com/users 因为我只想要一个响应，任何类型的响应）。我非常感谢任何形式的帮助！在此先感谢大家！

这是我的代码：

var https = require("https");



exports.handler = (event, context) => {

  try{

    if (event.session.new){
    // New Session
    console.log("new session!");
}
  switch (event.request.type){

    case "LaunchRequest":
    // > Launch Request
      console.log("launch request!");
      context.succeed(
        generateResponse(
          buildSpeechletResponse("Welcome!!!!!!!! Let's make this work!", true),
          {}
          )
      )
      break;

    case "IntentRequest":
    // > Intent Request
      console.log("intent request!"); // endpoint added here below
      switch(event.request.intent.name){
        case "getWeatherIntent":
          var endpoint = "https://jsonplaceholder.typicode.com/users"; // this works with this "placebo endpoint data" https://jsonplaceholder.typicode.com/posts ***** api.openweathermap.org/data/2.5/weather?zip=10005,us&APPID=08d6215ef934232110949692d5ffb8da
          var body = ""
          https.get(endpoint, (response) => {
            response.on('data', (chunk) => {body += chunk})
            response.on('end', () => {
              var data = JSON.parse(body);
              var weatherCount = data.userId; // might have something to do with this variable
              context.succeed(
                generateResponse(
                  buildSpeechletResponse("current is ${weatherCount}", true),
                  {}
                  )
                )
            })
          })
      }
      break; // endpoint added here above

    case "SessionEndedRequest":
    // > Session Ended Request
      console.log("session ended request!");
      break;

    default:
      context.fail("invalid request type!: {event.request.type}");
  }

  } catch(error) {context.fail("Exception: ${error}")}



}

// Helpers
buildSpeechletResponse = (outputText, shouldEndSession) => {
  return{
    outputSpeech:{
      type: "PlainText",
      text: outputText
    },
    shouldEndSession: shouldEndSession
  }
}

generateResponse = (speechletResponse, sessionAttributes) => { 
  return {
    version: "1.0",
    sessionAttributes: sessionAttributes,
    response: speechletResponse
  }
}

这里还有意图模式：

{
  "intents":[
   { "intent": "getWeatherIntent"
   }
  ]
}

这是 lambda 请求：

{
  "session": {
    "sessionId": "SessionId.51e05faf-df95-420f-9cfc-3736b1839482",
    "application": {
      "applicationId": "amzn1.ask.skill.482872e5-20a2-4230-bce4-a06b212443e5"
    },
    "attributes": {},
    "user": {
      "userId": "amzn1.ask.account.AFOFPAF44SZKQRQDFH3FW7PZCVEZPXLLPPWT7CO76Z62I2DVI5EFTYSFD3YMEA56R4ACYUSPTPVFGCA2BCFJCNBVLBNWAWSIOCXHCDTW5UM5WNIRE6K35XZ67CM3W2DN3NLIPRVEFWBZ3D6ASD37EYJWBQQFOK4FXB5NMGQCLJVGBJKUJMCZXVEHXU74KLSDXOV5MIF3UZPFLRA"
    },
    "new": true
  },
  "request": {
    "type": "IntentRequest",
    "requestId": "EdwRequestId.4b18c102-47ea-4855-a5da-6407379c0384",
    "locale": "en-US",
    "timestamp": "2017-02-28T02:13:25Z",
    "intent": {
      "name": "getWeatherIntent",
      "slots": {}
    }
  },
  "version": "1.0"
}

这是 lambda 响应：

{
  "version": "1.0",
  "response": {
    "outputSpeech": {
      "type": "PlainText",
      "text": "current is ${weatherCount}"
    },
    "shouldEndSession": true
  },
  "sessionAttributes": {}
}

变量 ${weatherCount} 不应该已经 return 从 JSON 解析出来的东西而不是 return 按原样再次解析吗？

这是将模板文字周围的引号更改为反引号（将“${weatherCount}”更改为 ${weatherCount} ）后的新 Lambda 响应，所以我们可能会有所作为！：

{
  "version": "1.0",
  "response": {
    "outputSpeech": {
      "type": "PlainText",
      "text": "current is [object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]"
    },
    "shouldEndSession": true
  },
  "sessionAttributes": {}
}

现在可以使用了！关键是将模板文字周围的引号更改为反引号。这是新的 lambda 请求和新的 lambda 响应。

Lamdba 请求：

{
  "session": {
    "sessionId": "SessionId.9f8cc454-110f-4610-a7fe-cd0918fd804f",
    "application": {
      "applicationId": "amzn1.ask.skill.482872e5-20a2-4230-bce4-a06b212443e5"
    },
    "attributes": {},
    "user": {
      "userId": "amzn1.ask.account.AFOFPAF44SZKQRQDFH3FW7PZCVEZPXLLPPWT7CO76Z62I2DVI5EFTYSFD3YMEA56R4ACYUSPTPVFGCA2BCFJCNBVLBNWAWSIOCXHCDTW5UM5WNIRE6K35XZ67CM3W2DN3NLIPRVEFWBZ3D6ASD37EYJWBQQFOK4FXB5NMGQCLJVGBJKUJMCZXVEHXU74KLSDXOV5MIF3UZPFLRA"
    },
    "new": true
  },
  "request": {
    "type": "IntentRequest",
    "requestId": "EdwRequestId.229831d9-3bd1-4173-a1c4-7664994a1a77",
    "locale": "en-US",
    "timestamp": "2017-02-28T02:39:30Z",
    "intent": {
      "name": "getWeatherIntent",
      "slots": {}
    }
  },
  "version": "1.0"
}

新的 Lambda 响应：

{
  "version": "1.0",
  "response": {
    "outputSpeech": {
      "type": "PlainText",
      "text": "current is 1"
    },
    "shouldEndSession": true
  },
  "sessionAttributes": {}
}

Answer 1

在我看来，这似乎是您 template literals 的问题。模板文字需要用反引号而不是单引号或双引号括起来。将所有使用模板文字的字符串的引号替换为反引号。

例如：

"current is ${weatherCount}"

变为：

`current is ${weatherCount}`

其他故障排除提示：

确保您使用的是 AWS Lambda 可用的最新版本的节点；在撰写本文时，即 v4.3.2。旧版本的节点不支持模板文字。
如果这些步骤中的任何一个都失败，只需将模板文字替换为变量即可将其排除为您的问题。
console.log 输出被写入 AWS Lambda 中的 cloudwatch——您可以使用它来调试 lambda 函数的每次调用。更多信息在这里：http://docs.aws.amazon.com/lambda/latest/dg/nodejs-prog-model-logging.html

我没有从 Amazon Lambda 获得适当的 JSON 响应

I am not getting appropriate JSON response from Amazon Lambda

json

node.js

amazon-web-services

aws-lambda

alexa